योगवासिष्ठः yogavāsiṣṭhaḥ - book-3, chapter-65, verse-4

अपारावारविस्तारसंवित्सलिलवल्गनैः ।
चिदेकार्णव एवायं स्वयमात्मा विजृम्भते ॥ ४ ॥

apārāvāravistārasaṃvitsalilavalganaiḥ ,
cidekārṇava evāyaṃ svayamātmā vijṛmbhate 4

4. apārāvāravistārasaṃvitsalilavalganaiḥ
cidekārṇavaḥ eva ayam svayam ātman vijṛmbhate

4. ayam svayam ātman cidekārṇavaḥ eva
apārāvāravistārasaṃvitsalilavalganaiḥ vijṛmbhate

4. This very self (ātman), which is a single ocean of consciousness (cit), expands and manifests itself spontaneously through the surging waves of the boundless and vast waters of its own consciousness (saṃvit).

Words meanings summery:

• अपारावारविस्तारसंवित्सलिलवल्गनैः (apārāvāravistārasaṁvitsalilavalganaiḥ) - by the surging waves of the boundless and vast waters of consciousness

• चिदेकार्णवः (cidekārṇavaḥ) - the one ocean of consciousness

• एव (eva) - indeed, only, very, certainly

• अयम् (ayam) - this, this one

• स्वयम् (svayam) - oneself, by itself, spontaneously

• आत्मन् (ātman) - the self, soul, spirit

• विजृम्भते (vijṛmbhate) - expands, manifests, opens wide, yawns (in a creative sense)

Words meanings and morphology

अपारावारविस्तारसंवित्सलिलवल्गनैः (apārāvāravistārasaṁvitsalilavalganaiḥ) - by the surging waves of the boundless and vast waters of consciousness

(noun)

Instrumental, masculine, plural of apārāvāravistārasaṃvitsalilavalgana

apārāvāravistārasaṁvitsalilavalgana - surging waves of boundless, vast waters of consciousness

Compound type : tatpurusha (apārāvāra+vistāra+saṃvit+salila+valgana)

• apārāvāra – shoreless, boundless, infinite
  adjective
  Compound: a (negation) + pāra (shore) + avāra (shore)
  Prefix: a
• vistāra – expansion, vastness, extensiveness
  noun (masculine)
  From root stṛ 'to spread' with prefix vi
  Prefix: vi
  Root: stṛ (class 5)
• saṃvit – consciousness, knowledge, intelligence, understanding
  noun (feminine)
  From root vid 'to know' with prefix sam
  Prefix: sam
  Root: vid (class 2)
• salila – water
  noun (neuter)
• valgana – leaping, springing, movement, surging, agitation, waves
  noun (neuter)
  From root valg 'to leap, spring'
  Root: valg (class 1)

Note: Indicates the means or instrument of the 'ātman's expansion.

चिदेकार्णवः (cidekārṇavaḥ) - the one ocean of consciousness

(noun)

Nominative, masculine, singular of cidekārṇava

cidekārṇava - the one ocean of consciousness

Compound type : karma-dhāraya (cit+eka+arṇava)

• cit – consciousness, intelligence, thought
  noun (feminine)
  From root cit 'to perceive, know'
  Root: cit (class 1)
• eka – one, single, sole
  numeral
• arṇava – ocean, sea, flood
  noun (masculine)

Note: An appositive noun phrase for 'ātman'.

एव (eva) - indeed, only, very, certainly

(indeclinable)

Note: Emphasizes the preceding word or concept.

अयम् (ayam) - this, this one

(pronoun)

Nominative, masculine, singular of idam

idam - this, this one

Note: Refers to 'ātman'.

स्वयम् (svayam) - oneself, by itself, spontaneously

(indeclinable)

Note: Emphasizes the self-driven nature of the expansion of ātman.

आत्मन् (ātman) - the self, soul, spirit

(noun)

Nominative, masculine, singular of ātman

ātman - the self, soul, spirit, essence

Root: an (class 2)

Note: Subject of the verb 'vijṛmbhate'.

विजृम्भते (vijṛmbhate) - expands, manifests, opens wide, yawns (in a creative sense)

(verb)

3rd person , singular, middle, present (laṭ) of vijṛmbh

Prefix: vi

Root: jṛmbh (class 1)

Note: The verb describes the self-expansion of 'ātman'.